Fire officials said the early Sunday morning fire at 1235 Main St., in Weymouth was intentionally set.

The Weymouth incident is the latest in a series of fires in vacant or abandoned buildings to be ruled arson on the South Shore.

"We are obviously concerned that any intentionally set fire in this region of the state could be connected to the series of fires we are investigating, but it is too soon to say at this point in time," Coan said.

Anyone with information on the Weymouth fire or any of the fires is asked to call the state Arson Hotline at 1-800-682-9229.